Improvement in pruxting-presses



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d ,n i wf" /HnRi/EY B. DENNY, or WASHINGTON, Dlsinio'r or COLUMBIA.Leners Baten No. 85,515, dass .ra/omg 51'8cs.

mrnovnnrnnr IN Pnnr'rrNePRI-:esrne The Schedule referred to LntheaeLetters Patent `and making pint of the lamo- -vw-v-w l To all 'whomit may conce'mrw Be it known that I, Hnnvnr B. DERHY, of the city andcounty of Washington, and District of Oolumhia,

have invented certain new and useful'lmprovements in Printing-Presses;`and I do hereby declare that the following is a suiiiciently full,clear, and exact description thereof, to enable one skilled in the artto which my said invention appertains, to make and use it, refeneneebeing had to the accompanying drawings, which i'orrn a part `of thisspccication.

My improvements consist- First, in a device for turning the platen fromavertical to a horizontal position, andofics corso.

Second, in a device for bracing the platen rigidly on itssupporting-arms while taking auimpression,

Third, inproviding the lower cylinder with horizontal adjustment, s othat it may be placed out of action when no t required.

FourthL in a device im' supporting andiopcmting the inking-roller orrollers.

Filth, in the employment; of a section-ral ink-i`ountain knife, for thepurpose of more freely ie'gulating or varyin the supply of ink todifferent parts of the form.

Figure 1 represents a plan of a press illustrating my invention. 4

Figure 2 represents a vertical section in the plane indicated by theline a: a: in iig. 1, showing the platen in position to receive a sheetto be printed.

Figure 3 represents a section, in the saine plane, of the front portionofthe press, showing the parts in position for taking an impression.

Figure 4 is a perspective view of one lower corner of the pieten and itsattachments, illustrating the man ner of ylooking it in a verticalposition, as hereinafter e'xLj pllihd.' Y 'i 4 4 A A A represent variousparte of the stationary 'frame B.B are two uprightarms, fulcrumedattheir lower ends, and having pivoted to their upper ends the platen0,the 'trunnions c c of which are connected by rods D D to thedriving-wheels E E, which are` rotated in unison to impart theforwardaud backward motion to mechanism, not necessary to be described.

and receive a fresh sheet, and permit itto be turned into the verticalposition represented in iig.,3, when it is drawn forward to take animpression. Y

A The frisket F is hinged at j; and elevated i'rom the platen, as thelatternioves bank iiom the iorm, by means of a lever, G, projectingrigidly from said frisket, and working against a stationary pin g, onthe frame A.

the iisket against the fece ot' the platen, when it is released from thepin y,

A spring, H, serves to press tical position. p

I represents a horizontal bar, adapted to slide in vertical slots in thenrmsB, and pressed upward by springs i.

Stationary cams JI on the frame A depress lthe har I, as the arms B Bare drawn forward, and cause it to engage (when released) with lugs I',near the lower edge of the platen, to brace the latter in its verticalposition, and nesist any excessive pressure which may -bevv applied toits upper part in the act of printing.

K represents the form-bed, to which the chase may be connected in anyusual or proper manner.

L represents an ink-iouuteiu.

The ink-ibuntain knife or regulating-plate is made in anumher oiseparate sections, M M M M, in each of which one ormone set-screws, N,are' swivelled, so that either section may be drawn up or pressed downby the platen moving' forward and turning into a verindependentlyoiftliepthers.

. The dow of' ink muy thus .be regulatorias-required, and variedat'diierent parts, so that a larger or smaller quantity of ink may beapplied to diierent parts of the form.

To insure the more uniform inlring of the upperand lower edges Aof theform, I employ two separate inkcylindere, O P, over both of which the'inlringroller Q g is passed at everyfull strolreof the press.

The lower cylinder P is mounted in hinged brackets p, or provided withahorizontal adjustment, in any other suitable way, su that it may beremoved from contact with .the inlring-rollerwhen the upper cylinw deronly is required to be used.

The lnkiug-rollerQ is carried by arms or lever-slt RT, fnlcrumcd on atransverse shaft, S, and vibratcd by a stud and roller, T, upon one oreach of the arms B, working in a oem-groove, U, on the inner face .of'one or each of the driving-wheels E.

rThese cam-grooves are so formed `that while the press is in continuousoperation, the inlring-rcller will rest or dwell for a short time incontact with each of the cylinders O P, so as toA change the surfaceswhich will 'come in contact with the various parte of the form, and alsothe eontactsurfaces of4 the cylinders.

'lhe various-rollersv may be driven by any suitable The inking-roller Q,works in longitudinal slots in theiree ends of the arms R Rl, and isdrawn inward bysprings V, so as to cause it to press with suiiiientforce against the distributing-rollers O P, and all parts of the form,as it passes over them. The rear ends of the vibrating armsRR' areweighted, as shown, to counterbalance the longer ends, andtheinlcingrollcr thereon. 4 l The following may be'namedamong theadvantages of my invention: i

First, the general construction of the press comyblues simplicity andoheapness with ease and regularity of movement.

ASecond, my mode of turning the platen to and fromt its horizontalposition, aiords i greater length of tlnie for putting on and taking othe sheets of paper to be printed.

Third, it is sometimes' desirahle'to printer form of type above thecentre of the pleteu. The platen, if not locked Irmly :Lt/the time ofthe impression, would tilt up, end not present a fair surface to thetype.

Fourth, I provide additional and more eiective distribution of ink, byemploying a double set of ink-cylieders and distributing-rollers, andlocating them both above and below the form.

AFifth, on coarse work, where it is desirable to save power necessary torun the press, or for other reasons, b'y throwing thc lower cylinder outof contact willi the ink-rollers, the lower cylinder and itsdistributing-rollers will be stationary, and'the power necessary to runthem be saved. A

Sixth, by constructing the arms that carry the inkrollers of one pieceof metal, instead of the number usually employed, a saving is made onthe originel oost of construction, in the power necessary to run thepress, and all play ru the the' press can be run at e higher speed thanthe majority can, and much` noise und danger of breakage nre avoided.

Seventh, by giving the ink-rollers a dwell for the purpose ofreceiving,r a charge of ink, both above and below the form, a change ismade in the distributingsurface, and the ink spread over a much greatersnrface. The ink-rollers pass from the top distributingcylinder downover the type-form, tothe lower cylinder, where they stop, redistributethe ink1 and again go over the type to they top cylinder.

Eighth, where the ink-knife of the fountain is oonstructcd of one piece,and the set-screws merely pressk down on the top of it, one screw aieetsthe knife to some connections being avoided,

distsuoeon each side. It is sometimes desirable to allow a. good supplyof ink et e certain point, and but little above and below it. This it isdiiiioult 'to accomplish bythe old style of fountain, for the reasonabove stated.

Having thus described my invention, the following is what I claim asnew, and desire to secure by Letters Patent:

1. In combination with the platen 0, pivoted to the rocking arms B B, Iclaire the inclined surface c, employed to turn the said platen from itshorizontal position, as described.

2. Locking the platen firmly when in a Vertical position, and at thetime of taking an impression, between the upright arms,"by which it iscarried, hy means substantially as set forth.

3. Making the lower cylinder adjustable, so that it can, if desired, bemoved back out of contact with the losing-rollers.

4. I claim, in combination, thriuk-eylinders O and l?, above and belowthe form, the rigid arms R R', fulcrumed irrterrnediately between theirends, and earrying the .iuking roller Q and the cam U, all arrangedsubsa-utilly as described, to pass the form, and canse it to dwell onthe cylinders botli above and below.

5. Constructing the ink-fountain knife of two 01j more pieces, andpassing the regulating-screw through the knife, for the purpose of morethoroughly controlling the supply of ink, and rendering the sections ofthe knife independent in their operation.

, H. B. DENNY.

Witnesses:`

Oorsvrus KNIGHT, WM. H. Bnnrmros.

